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Replace static Scalar with a uint conversion in BP+

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This commit is contained in:
Luke Parker
2022-08-21 00:46:23 -04:00
parent f319966dca
commit 76db682a25
1 changed files with 1 additions and 8 deletions
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9
coins/monero/src/ringct/bulletproofs/plus.rs
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@@ -19,13 +19,6 @@ lazy_static! {
static ref GENERATORS: Generators = generators_core(b"bulletproof_plus"); static ref GENERATORS: Generators = generators_core(b"bulletproof_plus");
static ref TRANSCRIPT: [u8; 32] = static ref TRANSCRIPT: [u8; 32] =
EdwardsPoint(raw_hash_to_point(hash(b"bulletproof_plus_transcript"))).compress().to_bytes(); EdwardsPoint(raw_hash_to_point(hash(b"bulletproof_plus_transcript"))).compress().to_bytes();
static ref TWO_SIXTY_FOUR_MINUS_ONE: Scalar = {
let mut temp = Scalar::from(2u8);
for _ in 0 .. LOG_N {
temp *= temp;
}
temp - Scalar::one()
};
} }
// TRANSCRIPT isn't a Scalar, so we need this alternative for the first hash // TRANSCRIPT isn't a Scalar, so we need this alternative for the first hash
@@ -253,7 +246,7 @@ impl PlusStruct {
proof.push((minus_esq, A)); proof.push((minus_esq, A));
proof.push((Scalar(self.d1), G)); proof.push((Scalar(self.d1), G));
let d_sum = zpow.sum() * *TWO_SIXTY_FOUR_MINUS_ONE; let d_sum = zpow.sum() * Scalar::from(u64::MAX);
let y_sum = weighted_powers(y, MN).sum(); let y_sum = weighted_powers(y, MN).sum();
proof.push(( proof.push((
Scalar(self.r1 * y.0 * self.s1) + (esq * ((yMNy * z * d_sum) + ((zsq - z) * y_sum))), Scalar(self.r1 * y.0 * self.s1) + (esq * ((yMNy * z * d_sum) + ((zsq - z) * y_sum))),